Pump



D. R. HlLLlS I May 4, 1937.

PUMP

Original Filed Aug. 6, 1934 INVENTOR.

flazzzbfl ffifkls ATTORNEY.

Patented May 4, 1937 I I v PUMP David R. Hillis, Detroit, Micln, assignor to Trabon Engineering Corporation, Qleveland, Ohio, a "corporations: Ohio a Original application August 6, 1934, Serial No.

738,658. Divided and this application November 29, 1935, Serial No. 52,106

3 Claims. (01. 103-160) The present invention relates to a pump and register intermittently with the inlet ports 2| is a division of my application Serial Number and 22 respectively or with the outlet passage- 738,656 filed Aug. 6, 1934. ways 23 and 24 respectively in a manner that is Among the objects of the present invention self evident.

are the provision of a pump which may be driven Connecting passageways 28 and 30 are bored in by a rotating shaft and the provision of a pump the shaft 1 and respectively connect the cylinders 5 that is self-lubricating. 8 and 9 with the grooves 21 and 28. Each of these Still another object of this invention is the connecting passageways is so located that when provision of a pump that is durable and that is its respective groove is registering with its repositive in its action. spective inlet port, the piston in its respective 10 These and other objects of the invention will cylinder is making its inlet or suction stroke to appear as the description progresses, reference draw fluid into its cylinder and when its respecbeing had to the accompanying drawing, in tive groove is registering with its respective outlet which: passageway, its respective piston is making its Fig. 1 is a longitudinal sectional view of the power stroke, forcing fluid out of the passageway pump with parts of the enlarged portionof the 26. As the pistons are shown, piston III has shaft being broken away to show details of conju t co p e its suc s o a p o ll struction. has just completed its power stroke. Fig. 2 is a cross section taken on line 2-2 of The reciprocatio 0f the Pi on is u d y Fig. 1. mounting the rings on races carrying the same Referring now to the drawing, in which like off-center of the shaft 1 which the said races 20 reference characters designate like parts throughurround. Th rotation of the shaft carries the out, the numeral I represents the entire housing pistons around w th i and the resultin eccentric or body of the pump and it is preferably made or cam action, occasioned by the off-center loca-' in two parts 2 and 3, thus permitting easy assemtion of the races with respect to the shaft, causes bly of the pump mechanism. the pistons to reciprocate as they turn around Mounted in the housing is a pump drive shaft with the shaft.

5 which is provided with any suitable sealing An inlet passage 3| is provided in the portion means 6 for preventing any fluid within the hous- 3 of the housing I, permitting the fluid to flow ing from extruding through the opening for the into the pump from any suitable containers shaft. which may be connected thereto.

The shaft 5 has an enlarged inner portion 1 Having thus fully described my invention, it is suitably bored to provide cylinders 8 and 9 for obvious that one or more than two pistons may reciprocating pistons l0 and II respectively sereadily be used and that other modifications may cured by wrist pins I4 and I5 to the inner races be made. I do not therefore desire to be limited or rings l2 and I3 of bearing assemblies A and B to the exact structure shown in the drawing nor having outer races l6 and I1 respectively and a to be limited save as may be required. by the series of rollers l8 between each inner and outer prior art and the scope of the appended claims. race, the races being suitably formed to receive I claim: I

the said rollers. 1. In combination in a self-lubricating pump, 40

Located within the housing portion 2 is a a hollow housing, an inlet passage therein for spacin rin H wh h o d the outer races l6 admitting fluid into said hollow housing, a shaft and II in their proper places. I journalled in said housing and extending there- Surroundlng the enlarged portion 1 ofthe from, a cylindrical aperture disposed transversepump shaft 5 and between the bearing assemblies ly in the portion of said shaft in said housing 45 a A and B is a pump valve sleeve 20 which cooperand open at one end, a piston slidable in said ates with the said'enlarged portion 1 of the drive aperture, means for reciprocating said piston in Shaft i forming a valve- The Said. a said aperture as said shaft rotates in said hous- O inlet ports 2l and 22 and tWO let pas ageing, a sleeve mounted for free rotation on said w ys 23 and 24 discharging into an outlet port shaft, an inlet port in said sleeve for receiving 50 25 in a fitting 26 which is threaded into said said fluid admitted into said hollow housing, an sleeve 20 and Projects through e p 8 ring outlet port in said sleeve, an outlet pipe extend- 9 and t ou housing .ing through the side wall of said hollow housing The enlar ed p rtion 1 0f the P p Shaft 5 is into said outlet port for receiving high pressure P v W W grooves TI and 28 adapte to fluid therefrom and for holding the sleeve sta- 55 tionary relative to the shaft, and conduit means provided in said shaft for connecting from the closed end of said cylindrical aperture therein to said inlet port and to said outlet port alternately 5 as the shaft rotates.

2. In combination in a self-lubricating pump, a hollow housing, an inlet passage therein for admitting fluid into said hollow housing, a shaft journalled in'said housing and extending therefrom, a cylindrical aperture disposed transversely in the portion of said shaft in said housing and open at one end, a piston slidable in said aperture, means for reciprocating said piston in said aperture as said shaft rotates in said housing, a sleeve mounted for free rotation on said shaft, an inlet port in said sleeve for receiving said fluid admitted into said hollow housing, an outlet port in said sleeve, an outlet pipe extending through the side wall of said hollow housing into said outlet port for receiving high pressure fluid therefrom and for holding the sleeve stationary relative to the shaft, a groove in the side of said shaft adapted to register alternately with the inlet port and the outlet port in said sleeve as the shaft rotates, and a passageway in said shaft connecting between said groove and the bottom portion of said cylindrical aperture.

3. In combination in a self-lubricating pump, a

a hollow housing, an inlet passage in said hollow housing for admittingfiuid therein. a shaft journalled in said housing and extending therefrom,-

a cylindrical aperture disposed transversely in the portion of said shaft in said housing and open at one end, a piston slidable in said aperture, a sleeve mounted for free rotation on said shaft, an inlet port in said sleeve for receiving said fluid from said hollow housing, an outlet port in said sleeve, an outlet pipe extending through the side wall of said hollow housing into said outlet port for receiving high pressure fluid therefrom and for holding the sleeve stationary relative to the shaft, conduit means provided in said shaft for connecting alternately from the closed end of said cylindrical aperture to the inlet port and to the outlet port in said sleeve as the shaft rotates, means for reciprocating said piston in said aperture as the shaft rotates in said housing, a bearing race in the fluid receiving hollow portion of said housing in eccentrically disposed relation around said shaft, a piston actuating ring disposed within said bearing race around said shaft, an extended portion on said piston andmeans connecting the extended portion of said piston with said piston actuating ring.

DAVID R. HILLIS. 

